Stock-Based Compensation
6 Months Ended
Jun. 30, 2019
Stock-Based Compensation  
Stock-Based Compensation

10. Stock-Based Compensation

Service-Based Stock Options

During the six months ended June 30, 2019, the Company granted options with service-based vesting conditions for the purchase of 1,967,304 shares of common stock with a weighted average exercise price of $14.85 per share and a weighted average grant-date fair value of $10.07 per share.

Stock-Based Compensation

The Company recorded stock-based compensation expense in the following expense categories of its condensed consolidated statements of operations and comprehensive loss (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended June 30, 

 

Six Months Ended June 30, 

 

    

2019

    

2018

    

2019

    

2018

Research and development expenses

 

$

2,612

 

$

719

 

$

4,603

 

$

984

General and administrative expenses

 

 

7,992

 

 

5,183

 

 

15,479

 

 

7,531

 

 

$

10,604

 

$

5,902

 

$

20,082

 

$

8,515

 

As of June 30, 2019, total unrecognized compensation cost related to the unvested stock-based awards was $89.5 million, which is expected to be recognized over a weighted average period of 2.4 years.